Commit | Line | Data |
---|---|---|
d67ae825 TH |
1 | /* |
2 | * Module for pnfs flexfile layout driver. | |
3 | * | |
4 | * Copyright (c) 2014, Primary Data, Inc. All rights reserved. | |
5 | * | |
6 | * Tao Peng <bergwolf@primarydata.com> | |
7 | */ | |
8 | ||
9 | #include <linux/nfs_fs.h> | |
10 | #include <linux/nfs_page.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | #include <linux/sunrpc/metrics.h> | |
d67ae825 TH |
14 | |
15 | #include "flexfilelayout.h" | |
16 | #include "../nfs4session.h" | |
40c64c26 | 17 | #include "../nfs4idmap.h" |
d67ae825 TH |
18 | #include "../internal.h" |
19 | #include "../delegation.h" | |
20 | #include "../nfs4trace.h" | |
21 | #include "../iostat.h" | |
22 | #include "../nfs.h" | |
ad4dc53e | 23 | #include "../nfs42.h" |
d67ae825 TH |
24 | |
25 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
26 | ||
27 | #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) | |
28 | ||
90a0be00 JL |
29 | static struct group_info *ff_zero_group; |
30 | ||
d67ae825 TH |
31 | static struct pnfs_layout_hdr * |
32 | ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
33 | { | |
34 | struct nfs4_flexfile_layout *ffl; | |
35 | ||
36 | ffl = kzalloc(sizeof(*ffl), gfp_flags); | |
37 | if (ffl) { | |
38 | INIT_LIST_HEAD(&ffl->error_list); | |
266d12d4 | 39 | INIT_LIST_HEAD(&ffl->mirrors); |
1c8d477a | 40 | ffl->last_report_time = ktime_get(); |
d67ae825 TH |
41 | return &ffl->generic_hdr; |
42 | } else | |
43 | return NULL; | |
44 | } | |
45 | ||
46 | static void | |
47 | ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
48 | { | |
49 | struct nfs4_ff_layout_ds_err *err, *n; | |
50 | ||
51 | list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list, | |
52 | list) { | |
53 | list_del(&err->list); | |
54 | kfree(err); | |
55 | } | |
56 | kfree(FF_LAYOUT_FROM_HDR(lo)); | |
57 | } | |
58 | ||
93b717fd | 59 | static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
d67ae825 TH |
60 | { |
61 | __be32 *p; | |
62 | ||
63 | p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); | |
64 | if (unlikely(p == NULL)) | |
65 | return -ENOBUFS; | |
93b717fd TM |
66 | stateid->type = NFS4_PNFS_DS_STATEID_TYPE; |
67 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); | |
d67ae825 TH |
68 | dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, |
69 | p[0], p[1], p[2], p[3]); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) | |
74 | { | |
75 | __be32 *p; | |
76 | ||
77 | p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); | |
78 | if (unlikely(!p)) | |
79 | return -ENOBUFS; | |
80 | memcpy(devid, p, NFS4_DEVICEID4_SIZE); | |
81 | nfs4_print_deviceid(devid); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) | |
86 | { | |
87 | __be32 *p; | |
88 | ||
89 | p = xdr_inline_decode(xdr, 4); | |
90 | if (unlikely(!p)) | |
91 | return -ENOBUFS; | |
92 | fh->size = be32_to_cpup(p++); | |
93 | if (fh->size > sizeof(struct nfs_fh)) { | |
94 | printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", | |
95 | fh->size); | |
96 | return -EOVERFLOW; | |
97 | } | |
98 | /* fh.data */ | |
99 | p = xdr_inline_decode(xdr, fh->size); | |
100 | if (unlikely(!p)) | |
101 | return -ENOBUFS; | |
102 | memcpy(&fh->data, p, fh->size); | |
103 | dprintk("%s: fh len %d\n", __func__, fh->size); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | /* | |
109 | * Currently only stringified uids and gids are accepted. | |
110 | * I.e., kerberos is not supported to the DSes, so no pricipals. | |
111 | * | |
112 | * That means that one common function will suffice, but when | |
113 | * principals are added, this should be split to accomodate | |
114 | * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). | |
115 | */ | |
116 | static int | |
117 | decode_name(struct xdr_stream *xdr, u32 *id) | |
118 | { | |
119 | __be32 *p; | |
120 | int len; | |
121 | ||
122 | /* opaque_length(4)*/ | |
123 | p = xdr_inline_decode(xdr, 4); | |
124 | if (unlikely(!p)) | |
125 | return -ENOBUFS; | |
126 | len = be32_to_cpup(p++); | |
127 | if (len < 0) | |
128 | return -EINVAL; | |
129 | ||
130 | dprintk("%s: len %u\n", __func__, len); | |
131 | ||
132 | /* opaque body */ | |
133 | p = xdr_inline_decode(xdr, len); | |
134 | if (unlikely(!p)) | |
135 | return -ENOBUFS; | |
136 | ||
137 | if (!nfs_map_string_to_numeric((char *)p, len, id)) | |
138 | return -EINVAL; | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
266d12d4 TM |
143 | static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, |
144 | const struct nfs4_ff_layout_mirror *m2) | |
145 | { | |
146 | int i, j; | |
147 | ||
148 | if (m1->fh_versions_cnt != m2->fh_versions_cnt) | |
149 | return false; | |
150 | for (i = 0; i < m1->fh_versions_cnt; i++) { | |
151 | bool found_fh = false; | |
86fb449b | 152 | for (j = 0; j < m2->fh_versions_cnt; j++) { |
266d12d4 TM |
153 | if (nfs_compare_fh(&m1->fh_versions[i], |
154 | &m2->fh_versions[j]) == 0) { | |
155 | found_fh = true; | |
156 | break; | |
157 | } | |
158 | } | |
159 | if (!found_fh) | |
160 | return false; | |
161 | } | |
162 | return true; | |
163 | } | |
164 | ||
165 | static struct nfs4_ff_layout_mirror * | |
166 | ff_layout_add_mirror(struct pnfs_layout_hdr *lo, | |
167 | struct nfs4_ff_layout_mirror *mirror) | |
168 | { | |
169 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); | |
170 | struct nfs4_ff_layout_mirror *pos; | |
171 | struct inode *inode = lo->plh_inode; | |
172 | ||
173 | spin_lock(&inode->i_lock); | |
174 | list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { | |
175 | if (mirror->mirror_ds != pos->mirror_ds) | |
176 | continue; | |
177 | if (!ff_mirror_match_fh(mirror, pos)) | |
178 | continue; | |
179 | if (atomic_inc_not_zero(&pos->ref)) { | |
180 | spin_unlock(&inode->i_lock); | |
181 | return pos; | |
182 | } | |
183 | } | |
184 | list_add(&mirror->mirrors, &ff_layout->mirrors); | |
185 | mirror->layout = lo; | |
186 | spin_unlock(&inode->i_lock); | |
187 | return mirror; | |
188 | } | |
189 | ||
e3b1df2d | 190 | static void |
266d12d4 TM |
191 | ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) |
192 | { | |
193 | struct inode *inode; | |
194 | if (mirror->layout == NULL) | |
195 | return; | |
196 | inode = mirror->layout->plh_inode; | |
197 | spin_lock(&inode->i_lock); | |
198 | list_del(&mirror->mirrors); | |
199 | spin_unlock(&inode->i_lock); | |
200 | mirror->layout = NULL; | |
201 | } | |
202 | ||
28a0d72c TM |
203 | static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags) |
204 | { | |
205 | struct nfs4_ff_layout_mirror *mirror; | |
206 | ||
207 | mirror = kzalloc(sizeof(*mirror), gfp_flags); | |
208 | if (mirror != NULL) { | |
209 | spin_lock_init(&mirror->lock); | |
210 | atomic_set(&mirror->ref, 1); | |
266d12d4 | 211 | INIT_LIST_HEAD(&mirror->mirrors); |
28a0d72c TM |
212 | } |
213 | return mirror; | |
214 | } | |
215 | ||
216 | static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) | |
217 | { | |
3064b686 JL |
218 | struct rpc_cred *cred; |
219 | ||
266d12d4 | 220 | ff_layout_remove_mirror(mirror); |
28a0d72c | 221 | kfree(mirror->fh_versions); |
3064b686 JL |
222 | cred = rcu_access_pointer(mirror->ro_cred); |
223 | if (cred) | |
224 | put_rpccred(cred); | |
225 | cred = rcu_access_pointer(mirror->rw_cred); | |
226 | if (cred) | |
227 | put_rpccred(cred); | |
28a0d72c TM |
228 | nfs4_ff_layout_put_deviceid(mirror->mirror_ds); |
229 | kfree(mirror); | |
230 | } | |
231 | ||
232 | static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) | |
233 | { | |
234 | if (mirror != NULL && atomic_dec_and_test(&mirror->ref)) | |
235 | ff_layout_free_mirror(mirror); | |
236 | } | |
237 | ||
d67ae825 TH |
238 | static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) |
239 | { | |
240 | int i; | |
241 | ||
242 | if (fls->mirror_array) { | |
243 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
244 | /* normally mirror_ds is freed in | |
245 | * .free_deviceid_node but we still do it here | |
246 | * for .alloc_lseg error path */ | |
28a0d72c | 247 | ff_layout_put_mirror(fls->mirror_array[i]); |
d67ae825 TH |
248 | } |
249 | kfree(fls->mirror_array); | |
250 | fls->mirror_array = NULL; | |
251 | } | |
252 | } | |
253 | ||
254 | static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr) | |
255 | { | |
256 | int ret = 0; | |
257 | ||
258 | dprintk("--> %s\n", __func__); | |
259 | ||
260 | /* FIXME: remove this check when layout segment support is added */ | |
261 | if (lgr->range.offset != 0 || | |
262 | lgr->range.length != NFS4_MAX_UINT64) { | |
263 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
264 | __func__); | |
265 | ret = -EINVAL; | |
266 | } | |
267 | ||
268 | dprintk("--> %s returns %d\n", __func__, ret); | |
269 | return ret; | |
270 | } | |
271 | ||
272 | static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) | |
273 | { | |
274 | if (fls) { | |
275 | ff_layout_free_mirror_array(fls); | |
276 | kfree(fls); | |
277 | } | |
278 | } | |
279 | ||
0762ed2c TM |
280 | static bool |
281 | ff_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
282 | const struct pnfs_layout_range *l2) | |
283 | { | |
284 | u64 end1, end2; | |
285 | ||
286 | if (l1->iomode != l2->iomode) | |
287 | return l1->iomode != IOMODE_READ; | |
288 | end1 = pnfs_calc_offset_end(l1->offset, l1->length); | |
289 | end2 = pnfs_calc_offset_end(l2->offset, l2->length); | |
290 | if (end1 < l2->offset) | |
291 | return false; | |
292 | if (end2 < l1->offset) | |
293 | return true; | |
294 | return l2->offset <= l1->offset; | |
295 | } | |
296 | ||
297 | static bool | |
298 | ff_lseg_merge(struct pnfs_layout_segment *new, | |
299 | struct pnfs_layout_segment *old) | |
300 | { | |
301 | u64 new_end, old_end; | |
302 | ||
ee26bdd6 JL |
303 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags)) |
304 | return false; | |
0762ed2c TM |
305 | if (new->pls_range.iomode != old->pls_range.iomode) |
306 | return false; | |
307 | old_end = pnfs_calc_offset_end(old->pls_range.offset, | |
308 | old->pls_range.length); | |
309 | if (old_end < new->pls_range.offset) | |
310 | return false; | |
311 | new_end = pnfs_calc_offset_end(new->pls_range.offset, | |
312 | new->pls_range.length); | |
313 | if (new_end < old->pls_range.offset) | |
314 | return false; | |
315 | ||
316 | /* Mergeable: copy info from 'old' to 'new' */ | |
317 | if (new_end < old_end) | |
318 | new_end = old_end; | |
319 | if (new->pls_range.offset < old->pls_range.offset) | |
320 | new->pls_range.offset = old->pls_range.offset; | |
321 | new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset, | |
322 | new_end); | |
323 | if (test_bit(NFS_LSEG_ROC, &old->pls_flags)) | |
324 | set_bit(NFS_LSEG_ROC, &new->pls_flags); | |
0762ed2c TM |
325 | return true; |
326 | } | |
327 | ||
328 | static void | |
329 | ff_layout_add_lseg(struct pnfs_layout_hdr *lo, | |
330 | struct pnfs_layout_segment *lseg, | |
331 | struct list_head *free_me) | |
332 | { | |
333 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
334 | ff_lseg_range_is_after, | |
335 | ff_lseg_merge, | |
336 | free_me); | |
337 | } | |
338 | ||
d67ae825 TH |
339 | static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) |
340 | { | |
d67ae825 TH |
341 | int i, j; |
342 | ||
343 | for (i = 0; i < fls->mirror_array_cnt - 1; i++) { | |
344 | for (j = i + 1; j < fls->mirror_array_cnt; j++) | |
345 | if (fls->mirror_array[i]->efficiency < | |
455b6ee6 FF |
346 | fls->mirror_array[j]->efficiency) |
347 | swap(fls->mirror_array[i], | |
348 | fls->mirror_array[j]); | |
d67ae825 TH |
349 | } |
350 | } | |
351 | ||
260074cd TM |
352 | static void ff_layout_mark_devices_valid(struct nfs4_ff_layout_segment *fls) |
353 | { | |
354 | struct nfs4_deviceid_node *node; | |
355 | int i; | |
356 | ||
357 | if (!(fls->flags & FF_FLAGS_NO_IO_THRU_MDS)) | |
358 | return; | |
359 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
360 | node = &fls->mirror_array[i]->mirror_ds->id_node; | |
361 | clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); | |
362 | } | |
363 | } | |
364 | ||
d67ae825 TH |
365 | static struct pnfs_layout_segment * |
366 | ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, | |
367 | struct nfs4_layoutget_res *lgr, | |
368 | gfp_t gfp_flags) | |
369 | { | |
370 | struct pnfs_layout_segment *ret; | |
371 | struct nfs4_ff_layout_segment *fls = NULL; | |
372 | struct xdr_stream stream; | |
373 | struct xdr_buf buf; | |
374 | struct page *scratch; | |
375 | u64 stripe_unit; | |
376 | u32 mirror_array_cnt; | |
377 | __be32 *p; | |
378 | int i, rc; | |
379 | ||
380 | dprintk("--> %s\n", __func__); | |
381 | scratch = alloc_page(gfp_flags); | |
382 | if (!scratch) | |
383 | return ERR_PTR(-ENOMEM); | |
384 | ||
385 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, | |
386 | lgr->layoutp->len); | |
387 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); | |
388 | ||
389 | /* stripe unit and mirror_array_cnt */ | |
390 | rc = -EIO; | |
391 | p = xdr_inline_decode(&stream, 8 + 4); | |
392 | if (!p) | |
393 | goto out_err_free; | |
394 | ||
395 | p = xdr_decode_hyper(p, &stripe_unit); | |
396 | mirror_array_cnt = be32_to_cpup(p++); | |
397 | dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, | |
398 | stripe_unit, mirror_array_cnt); | |
399 | ||
400 | if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || | |
401 | mirror_array_cnt == 0) | |
402 | goto out_err_free; | |
403 | ||
404 | rc = -ENOMEM; | |
405 | fls = kzalloc(sizeof(*fls), gfp_flags); | |
406 | if (!fls) | |
407 | goto out_err_free; | |
408 | ||
409 | fls->mirror_array_cnt = mirror_array_cnt; | |
410 | fls->stripe_unit = stripe_unit; | |
411 | fls->mirror_array = kcalloc(fls->mirror_array_cnt, | |
412 | sizeof(fls->mirror_array[0]), gfp_flags); | |
413 | if (fls->mirror_array == NULL) | |
414 | goto out_err_free; | |
415 | ||
416 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
266d12d4 | 417 | struct nfs4_ff_layout_mirror *mirror; |
d67ae825 TH |
418 | struct nfs4_deviceid devid; |
419 | struct nfs4_deviceid_node *idnode; | |
90a0be00 | 420 | struct auth_cred acred = { .group_info = ff_zero_group }; |
3064b686 | 421 | struct rpc_cred __rcu *cred; |
90a0be00 | 422 | u32 ds_count, fh_count, id; |
d67ae825 TH |
423 | int j; |
424 | ||
425 | rc = -EIO; | |
426 | p = xdr_inline_decode(&stream, 4); | |
427 | if (!p) | |
428 | goto out_err_free; | |
429 | ds_count = be32_to_cpup(p); | |
430 | ||
431 | /* FIXME: allow for striping? */ | |
432 | if (ds_count != 1) | |
433 | goto out_err_free; | |
434 | ||
28a0d72c | 435 | fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); |
d67ae825 TH |
436 | if (fls->mirror_array[i] == NULL) { |
437 | rc = -ENOMEM; | |
438 | goto out_err_free; | |
439 | } | |
440 | ||
d67ae825 TH |
441 | fls->mirror_array[i]->ds_count = ds_count; |
442 | ||
443 | /* deviceid */ | |
444 | rc = decode_deviceid(&stream, &devid); | |
445 | if (rc) | |
446 | goto out_err_free; | |
447 | ||
448 | idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode), | |
449 | &devid, lh->plh_lc_cred, | |
450 | gfp_flags); | |
451 | /* | |
452 | * upon success, mirror_ds is allocated by previous | |
453 | * getdeviceinfo, or newly by .alloc_deviceid_node | |
454 | * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure | |
455 | */ | |
456 | if (idnode) | |
457 | fls->mirror_array[i]->mirror_ds = | |
458 | FF_LAYOUT_MIRROR_DS(idnode); | |
459 | else | |
460 | goto out_err_free; | |
461 | ||
462 | /* efficiency */ | |
463 | rc = -EIO; | |
464 | p = xdr_inline_decode(&stream, 4); | |
465 | if (!p) | |
466 | goto out_err_free; | |
467 | fls->mirror_array[i]->efficiency = be32_to_cpup(p); | |
468 | ||
469 | /* stateid */ | |
93b717fd | 470 | rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid); |
d67ae825 TH |
471 | if (rc) |
472 | goto out_err_free; | |
473 | ||
474 | /* fh */ | |
475 | p = xdr_inline_decode(&stream, 4); | |
476 | if (!p) | |
477 | goto out_err_free; | |
478 | fh_count = be32_to_cpup(p); | |
479 | ||
480 | fls->mirror_array[i]->fh_versions = | |
481 | kzalloc(fh_count * sizeof(struct nfs_fh), | |
482 | gfp_flags); | |
483 | if (fls->mirror_array[i]->fh_versions == NULL) { | |
484 | rc = -ENOMEM; | |
485 | goto out_err_free; | |
486 | } | |
487 | ||
488 | for (j = 0; j < fh_count; j++) { | |
489 | rc = decode_nfs_fh(&stream, | |
490 | &fls->mirror_array[i]->fh_versions[j]); | |
491 | if (rc) | |
492 | goto out_err_free; | |
493 | } | |
494 | ||
495 | fls->mirror_array[i]->fh_versions_cnt = fh_count; | |
496 | ||
497 | /* user */ | |
90a0be00 | 498 | rc = decode_name(&stream, &id); |
d67ae825 TH |
499 | if (rc) |
500 | goto out_err_free; | |
501 | ||
90a0be00 JL |
502 | acred.uid = make_kuid(&init_user_ns, id); |
503 | ||
d67ae825 | 504 | /* group */ |
90a0be00 | 505 | rc = decode_name(&stream, &id); |
d67ae825 TH |
506 | if (rc) |
507 | goto out_err_free; | |
508 | ||
90a0be00 JL |
509 | acred.gid = make_kgid(&init_user_ns, id); |
510 | ||
511 | /* find the cred for it */ | |
3064b686 | 512 | rcu_assign_pointer(cred, rpc_lookup_generic_cred(&acred, 0, gfp_flags)); |
90a0be00 JL |
513 | if (IS_ERR(cred)) { |
514 | rc = PTR_ERR(cred); | |
515 | goto out_err_free; | |
516 | } | |
517 | ||
3064b686 JL |
518 | if (lgr->range.iomode == IOMODE_READ) |
519 | rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); | |
520 | else | |
521 | rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); | |
90a0be00 | 522 | |
266d12d4 TM |
523 | mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); |
524 | if (mirror != fls->mirror_array[i]) { | |
90a0be00 | 525 | /* swap cred ptrs so free_mirror will clean up old */ |
3064b686 JL |
526 | if (lgr->range.iomode == IOMODE_READ) { |
527 | cred = xchg(&mirror->ro_cred, cred); | |
528 | rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); | |
529 | } else { | |
530 | cred = xchg(&mirror->rw_cred, cred); | |
531 | rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); | |
532 | } | |
266d12d4 TM |
533 | ff_layout_free_mirror(fls->mirror_array[i]); |
534 | fls->mirror_array[i] = mirror; | |
535 | } | |
536 | ||
3064b686 JL |
537 | dprintk("%s: iomode %s uid %u gid %u\n", __func__, |
538 | lgr->range.iomode == IOMODE_READ ? "READ" : "RW", | |
90a0be00 JL |
539 | from_kuid(&init_user_ns, acred.uid), |
540 | from_kgid(&init_user_ns, acred.gid)); | |
d67ae825 TH |
541 | } |
542 | ||
c0f5f505 | 543 | p = xdr_inline_decode(&stream, 4); |
d0379a5d TM |
544 | if (!p) |
545 | goto out_sort_mirrors; | |
546 | fls->flags = be32_to_cpup(p); | |
547 | ||
548 | p = xdr_inline_decode(&stream, 4); | |
549 | if (!p) | |
550 | goto out_sort_mirrors; | |
551 | for (i=0; i < fls->mirror_array_cnt; i++) | |
552 | fls->mirror_array[i]->report_interval = be32_to_cpup(p); | |
c0f5f505 | 553 | |
d0379a5d | 554 | out_sort_mirrors: |
d67ae825 TH |
555 | ff_layout_sort_mirrors(fls); |
556 | rc = ff_layout_check_layout(lgr); | |
557 | if (rc) | |
558 | goto out_err_free; | |
260074cd | 559 | ff_layout_mark_devices_valid(fls); |
d67ae825 TH |
560 | |
561 | ret = &fls->generic_hdr; | |
562 | dprintk("<-- %s (success)\n", __func__); | |
563 | out_free_page: | |
564 | __free_page(scratch); | |
565 | return ret; | |
566 | out_err_free: | |
567 | _ff_layout_free_lseg(fls); | |
568 | ret = ERR_PTR(rc); | |
569 | dprintk("<-- %s (%d)\n", __func__, rc); | |
570 | goto out_free_page; | |
571 | } | |
572 | ||
573 | static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout) | |
574 | { | |
575 | struct pnfs_layout_segment *lseg; | |
576 | ||
577 | list_for_each_entry(lseg, &layout->plh_segs, pls_list) | |
578 | if (lseg->pls_range.iomode == IOMODE_RW) | |
579 | return true; | |
580 | ||
581 | return false; | |
582 | } | |
583 | ||
584 | static void | |
585 | ff_layout_free_lseg(struct pnfs_layout_segment *lseg) | |
586 | { | |
587 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
d67ae825 TH |
588 | |
589 | dprintk("--> %s\n", __func__); | |
590 | ||
d67ae825 TH |
591 | if (lseg->pls_range.iomode == IOMODE_RW) { |
592 | struct nfs4_flexfile_layout *ffl; | |
593 | struct inode *inode; | |
594 | ||
595 | ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); | |
596 | inode = ffl->generic_hdr.plh_inode; | |
597 | spin_lock(&inode->i_lock); | |
598 | if (!ff_layout_has_rw_segments(lseg->pls_layout)) { | |
599 | ffl->commit_info.nbuckets = 0; | |
600 | kfree(ffl->commit_info.buckets); | |
601 | ffl->commit_info.buckets = NULL; | |
602 | } | |
603 | spin_unlock(&inode->i_lock); | |
604 | } | |
605 | _ff_layout_free_lseg(fls); | |
606 | } | |
607 | ||
608 | /* Return 1 until we have multiple lsegs support */ | |
609 | static int | |
610 | ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls) | |
611 | { | |
612 | return 1; | |
613 | } | |
614 | ||
abcb7bfc | 615 | static void |
e76d28dd | 616 | nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 617 | { |
9bbd9bb4 PT |
618 | /* first IO request? */ |
619 | if (atomic_inc_return(&timer->n_ops) == 1) { | |
e76d28dd | 620 | timer->start_time = now; |
abcb7bfc TM |
621 | } |
622 | } | |
623 | ||
624 | static ktime_t | |
e76d28dd | 625 | nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 626 | { |
e76d28dd | 627 | ktime_t start; |
abcb7bfc | 628 | |
9bbd9bb4 PT |
629 | if (atomic_dec_return(&timer->n_ops) < 0) |
630 | WARN_ON_ONCE(1); | |
631 | ||
9bbd9bb4 PT |
632 | start = timer->start_time; |
633 | timer->start_time = now; | |
abcb7bfc TM |
634 | return ktime_sub(now, start); |
635 | } | |
636 | ||
97ba375b | 637 | static bool |
d983803d | 638 | nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, |
e76d28dd TM |
639 | struct nfs4_ff_layoutstat *layoutstat, |
640 | ktime_t now) | |
abcb7bfc | 641 | { |
d983803d | 642 | static const ktime_t notime = {0}; |
bbf58bf3 | 643 | s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; |
1c8d477a | 644 | struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); |
d983803d | 645 | |
e76d28dd | 646 | nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); |
9bbd9bb4 PT |
647 | if (ktime_equal(mirror->start_time, notime)) |
648 | mirror->start_time = now; | |
d0379a5d TM |
649 | if (mirror->report_interval != 0) |
650 | report_interval = (s64)mirror->report_interval * 1000LL; | |
651 | else if (layoutstats_timer != 0) | |
bbf58bf3 | 652 | report_interval = (s64)layoutstats_timer * 1000LL; |
1c8d477a | 653 | if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= |
bbf58bf3 | 654 | report_interval) { |
1c8d477a | 655 | ffl->last_report_time = now; |
97ba375b PT |
656 | return true; |
657 | } | |
658 | ||
659 | return false; | |
abcb7bfc TM |
660 | } |
661 | ||
662 | static void | |
663 | nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, | |
664 | __u64 requested) | |
665 | { | |
666 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
667 | ||
668 | iostat->ops_requested++; | |
669 | iostat->bytes_requested += requested; | |
670 | } | |
671 | ||
672 | static void | |
673 | nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, | |
674 | __u64 requested, | |
675 | __u64 completed, | |
e76d28dd TM |
676 | ktime_t time_completed, |
677 | ktime_t time_started) | |
abcb7bfc TM |
678 | { |
679 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
e76d28dd | 680 | ktime_t completion_time = ktime_sub(time_completed, time_started); |
abcb7bfc TM |
681 | ktime_t timer; |
682 | ||
683 | iostat->ops_completed++; | |
684 | iostat->bytes_completed += completed; | |
685 | iostat->bytes_not_delivered += requested - completed; | |
686 | ||
e76d28dd | 687 | timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); |
abcb7bfc TM |
688 | iostat->total_busy_time = |
689 | ktime_add(iostat->total_busy_time, timer); | |
690 | iostat->aggregate_completion_time = | |
e76d28dd TM |
691 | ktime_add(iostat->aggregate_completion_time, |
692 | completion_time); | |
abcb7bfc TM |
693 | } |
694 | ||
695 | static void | |
0b7baf94 TM |
696 | nfs4_ff_layout_stat_io_start_read(struct inode *inode, |
697 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 698 | __u64 requested, ktime_t now) |
abcb7bfc | 699 | { |
97ba375b PT |
700 | bool report; |
701 | ||
abcb7bfc | 702 | spin_lock(&mirror->lock); |
e76d28dd | 703 | report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); |
abcb7bfc TM |
704 | nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); |
705 | spin_unlock(&mirror->lock); | |
97ba375b PT |
706 | |
707 | if (report) | |
0b7baf94 | 708 | pnfs_report_layoutstat(inode, GFP_KERNEL); |
abcb7bfc TM |
709 | } |
710 | ||
711 | static void | |
712 | nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, | |
713 | struct nfs4_ff_layout_mirror *mirror, | |
714 | __u64 requested, | |
715 | __u64 completed) | |
716 | { | |
717 | spin_lock(&mirror->lock); | |
718 | nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, | |
719 | requested, completed, | |
e76d28dd | 720 | ktime_get(), task->tk_start); |
abcb7bfc TM |
721 | spin_unlock(&mirror->lock); |
722 | } | |
723 | ||
724 | static void | |
0b7baf94 TM |
725 | nfs4_ff_layout_stat_io_start_write(struct inode *inode, |
726 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 727 | __u64 requested, ktime_t now) |
abcb7bfc | 728 | { |
97ba375b PT |
729 | bool report; |
730 | ||
abcb7bfc | 731 | spin_lock(&mirror->lock); |
e76d28dd | 732 | report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); |
abcb7bfc TM |
733 | nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); |
734 | spin_unlock(&mirror->lock); | |
97ba375b PT |
735 | |
736 | if (report) | |
0b7baf94 | 737 | pnfs_report_layoutstat(inode, GFP_NOIO); |
abcb7bfc TM |
738 | } |
739 | ||
740 | static void | |
741 | nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, | |
742 | struct nfs4_ff_layout_mirror *mirror, | |
743 | __u64 requested, | |
744 | __u64 completed, | |
745 | enum nfs3_stable_how committed) | |
746 | { | |
747 | if (committed == NFS_UNSTABLE) | |
748 | requested = completed = 0; | |
749 | ||
750 | spin_lock(&mirror->lock); | |
751 | nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, | |
e76d28dd | 752 | requested, completed, ktime_get(), task->tk_start); |
abcb7bfc TM |
753 | spin_unlock(&mirror->lock); |
754 | } | |
755 | ||
d67ae825 TH |
756 | static int |
757 | ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
758 | struct nfs_commit_info *cinfo, | |
759 | gfp_t gfp_flags) | |
760 | { | |
761 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
762 | struct pnfs_commit_bucket *buckets; | |
763 | int size; | |
764 | ||
765 | if (cinfo->ds->nbuckets != 0) { | |
766 | /* This assumes there is only one RW lseg per file. | |
767 | * To support multiple lseg per file, we need to | |
768 | * change struct pnfs_commit_bucket to allow dynamic | |
769 | * increasing nbuckets. | |
770 | */ | |
771 | return 0; | |
772 | } | |
773 | ||
774 | size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg); | |
775 | ||
776 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), | |
777 | gfp_flags); | |
778 | if (!buckets) | |
779 | return -ENOMEM; | |
780 | else { | |
781 | int i; | |
782 | ||
fe238e60 | 783 | spin_lock(&cinfo->inode->i_lock); |
d67ae825 TH |
784 | if (cinfo->ds->nbuckets != 0) |
785 | kfree(buckets); | |
786 | else { | |
787 | cinfo->ds->buckets = buckets; | |
788 | cinfo->ds->nbuckets = size; | |
789 | for (i = 0; i < size; i++) { | |
790 | INIT_LIST_HEAD(&buckets[i].written); | |
791 | INIT_LIST_HEAD(&buckets[i].committing); | |
792 | /* mark direct verifier as unset */ | |
793 | buckets[i].direct_verf.committed = | |
794 | NFS_INVALID_STABLE_HOW; | |
795 | } | |
796 | } | |
fe238e60 | 797 | spin_unlock(&cinfo->inode->i_lock); |
d67ae825 TH |
798 | return 0; |
799 | } | |
800 | } | |
801 | ||
802 | static struct nfs4_pnfs_ds * | |
13544412 TM |
803 | ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, |
804 | int start_idx, | |
d67ae825 TH |
805 | int *best_idx) |
806 | { | |
13544412 | 807 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); |
d67ae825 | 808 | struct nfs4_pnfs_ds *ds; |
3dc14735 | 809 | bool fail_return = false; |
d67ae825 TH |
810 | int idx; |
811 | ||
d67ae825 | 812 | /* mirrors are sorted by efficiency */ |
13544412 | 813 | for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { |
3dc14735 TM |
814 | if (idx+1 == fls->mirror_array_cnt) |
815 | fail_return = true; | |
816 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, fail_return); | |
d67ae825 TH |
817 | if (ds) { |
818 | *best_idx = idx; | |
819 | return ds; | |
820 | } | |
821 | } | |
822 | ||
823 | return NULL; | |
824 | } | |
825 | ||
c7d73af2 TH |
826 | static void |
827 | ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, | |
828 | struct nfs_page *req, | |
829 | bool strict_iomode) | |
830 | { | |
831 | retry_strict: | |
832 | pnfs_put_lseg(pgio->pg_lseg); | |
833 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
834 | req->wb_context, | |
835 | 0, | |
836 | NFS4_MAX_UINT64, | |
837 | IOMODE_READ, | |
838 | strict_iomode, | |
839 | GFP_KERNEL); | |
840 | if (IS_ERR(pgio->pg_lseg)) { | |
841 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
842 | pgio->pg_lseg = NULL; | |
843 | } | |
844 | ||
845 | /* If we don't have checking, do get a IOMODE_RW | |
846 | * segment, and the server wants to avoid READs | |
847 | * there, then retry! | |
848 | */ | |
849 | if (pgio->pg_lseg && !strict_iomode && | |
850 | ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { | |
851 | strict_iomode = true; | |
852 | goto retry_strict; | |
853 | } | |
854 | } | |
855 | ||
d67ae825 TH |
856 | static void |
857 | ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, | |
858 | struct nfs_page *req) | |
859 | { | |
860 | struct nfs_pgio_mirror *pgm; | |
861 | struct nfs4_ff_layout_mirror *mirror; | |
862 | struct nfs4_pnfs_ds *ds; | |
863 | int ds_idx; | |
864 | ||
3dc14735 | 865 | retry: |
d67ae825 | 866 | /* Use full layout for now */ |
c7d73af2 TH |
867 | if (!pgio->pg_lseg) |
868 | ff_layout_pg_get_read(pgio, req, false); | |
869 | else if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) | |
870 | ff_layout_pg_get_read(pgio, req, true); | |
602c4cd4 | 871 | |
d67ae825 TH |
872 | /* If no lseg, fall back to read through mds */ |
873 | if (pgio->pg_lseg == NULL) | |
874 | goto out_mds; | |
875 | ||
13544412 | 876 | ds = ff_layout_choose_best_ds_for_read(pgio->pg_lseg, 0, &ds_idx); |
446ca219 | 877 | if (!ds) { |
3dc14735 | 878 | if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
446ca219 | 879 | goto out_mds; |
3dc14735 TM |
880 | pnfs_put_lseg(pgio->pg_lseg); |
881 | pgio->pg_lseg = NULL; | |
882 | /* Sleep for 1 second before retrying */ | |
883 | ssleep(1); | |
884 | goto retry; | |
446ca219 TH |
885 | } |
886 | ||
d67ae825 TH |
887 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); |
888 | ||
889 | pgio->pg_mirror_idx = ds_idx; | |
890 | ||
891 | /* read always uses only one mirror - idx 0 for pgio layer */ | |
892 | pgm = &pgio->pg_mirrors[0]; | |
893 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; | |
894 | ||
895 | return; | |
896 | out_mds: | |
897 | pnfs_put_lseg(pgio->pg_lseg); | |
898 | pgio->pg_lseg = NULL; | |
899 | nfs_pageio_reset_read_mds(pgio); | |
900 | } | |
901 | ||
902 | static void | |
903 | ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, | |
904 | struct nfs_page *req) | |
905 | { | |
906 | struct nfs4_ff_layout_mirror *mirror; | |
907 | struct nfs_pgio_mirror *pgm; | |
908 | struct nfs_commit_info cinfo; | |
909 | struct nfs4_pnfs_ds *ds; | |
910 | int i; | |
911 | int status; | |
912 | ||
3dc14735 | 913 | retry: |
d600ad1f | 914 | if (!pgio->pg_lseg) { |
d67ae825 TH |
915 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
916 | req->wb_context, | |
917 | 0, | |
918 | NFS4_MAX_UINT64, | |
919 | IOMODE_RW, | |
c7d73af2 | 920 | false, |
d67ae825 | 921 | GFP_NOFS); |
d600ad1f PT |
922 | if (IS_ERR(pgio->pg_lseg)) { |
923 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
924 | pgio->pg_lseg = NULL; | |
925 | return; | |
926 | } | |
927 | } | |
d67ae825 TH |
928 | /* If no lseg, fall back to write through mds */ |
929 | if (pgio->pg_lseg == NULL) | |
930 | goto out_mds; | |
931 | ||
932 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); | |
933 | status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
934 | if (status < 0) | |
935 | goto out_mds; | |
936 | ||
937 | /* Use a direct mapping of ds_idx to pgio mirror_idx */ | |
938 | if (WARN_ON_ONCE(pgio->pg_mirror_count != | |
939 | FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))) | |
940 | goto out_mds; | |
941 | ||
942 | for (i = 0; i < pgio->pg_mirror_count; i++) { | |
943 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true); | |
446ca219 | 944 | if (!ds) { |
3dc14735 | 945 | if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
446ca219 | 946 | goto out_mds; |
3dc14735 TM |
947 | pnfs_put_lseg(pgio->pg_lseg); |
948 | pgio->pg_lseg = NULL; | |
949 | /* Sleep for 1 second before retrying */ | |
950 | ssleep(1); | |
951 | goto retry; | |
446ca219 | 952 | } |
d67ae825 TH |
953 | pgm = &pgio->pg_mirrors[i]; |
954 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); | |
955 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; | |
956 | } | |
957 | ||
958 | return; | |
959 | ||
960 | out_mds: | |
961 | pnfs_put_lseg(pgio->pg_lseg); | |
962 | pgio->pg_lseg = NULL; | |
963 | nfs_pageio_reset_write_mds(pgio); | |
964 | } | |
965 | ||
966 | static unsigned int | |
967 | ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, | |
968 | struct nfs_page *req) | |
969 | { | |
d600ad1f | 970 | if (!pgio->pg_lseg) { |
d67ae825 TH |
971 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
972 | req->wb_context, | |
973 | 0, | |
974 | NFS4_MAX_UINT64, | |
975 | IOMODE_RW, | |
c7d73af2 | 976 | false, |
d67ae825 | 977 | GFP_NOFS); |
d600ad1f PT |
978 | if (IS_ERR(pgio->pg_lseg)) { |
979 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
980 | pgio->pg_lseg = NULL; | |
981 | goto out; | |
982 | } | |
983 | } | |
d67ae825 TH |
984 | if (pgio->pg_lseg) |
985 | return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); | |
986 | ||
987 | /* no lseg means that pnfs is not in use, so no mirroring here */ | |
d67ae825 | 988 | nfs_pageio_reset_write_mds(pgio); |
d600ad1f | 989 | out: |
d67ae825 TH |
990 | return 1; |
991 | } | |
992 | ||
993 | static const struct nfs_pageio_ops ff_layout_pg_read_ops = { | |
994 | .pg_init = ff_layout_pg_init_read, | |
995 | .pg_test = pnfs_generic_pg_test, | |
996 | .pg_doio = pnfs_generic_pg_readpages, | |
997 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
998 | }; | |
999 | ||
1000 | static const struct nfs_pageio_ops ff_layout_pg_write_ops = { | |
1001 | .pg_init = ff_layout_pg_init_write, | |
1002 | .pg_test = pnfs_generic_pg_test, | |
1003 | .pg_doio = pnfs_generic_pg_writepages, | |
1004 | .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, | |
1005 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
1006 | }; | |
1007 | ||
1008 | static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) | |
1009 | { | |
1010 | struct rpc_task *task = &hdr->task; | |
1011 | ||
1012 | pnfs_layoutcommit_inode(hdr->inode, false); | |
1013 | ||
1014 | if (retry_pnfs) { | |
1015 | dprintk("%s Reset task %5u for i/o through pNFS " | |
1016 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1017 | hdr->task.tk_pid, | |
1018 | hdr->inode->i_sb->s_id, | |
1019 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1020 | hdr->args.count, | |
1021 | (unsigned long long)hdr->args.offset); | |
1022 | ||
dc602dd7 | 1023 | hdr->completion_ops->reschedule_io(hdr); |
d67ae825 TH |
1024 | return; |
1025 | } | |
1026 | ||
1027 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
1028 | dprintk("%s Reset task %5u for i/o through MDS " | |
1029 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1030 | hdr->task.tk_pid, | |
1031 | hdr->inode->i_sb->s_id, | |
1032 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1033 | hdr->args.count, | |
1034 | (unsigned long long)hdr->args.offset); | |
1035 | ||
1036 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | static void ff_layout_reset_read(struct nfs_pgio_header *hdr) | |
1041 | { | |
1042 | struct rpc_task *task = &hdr->task; | |
1043 | ||
1044 | pnfs_layoutcommit_inode(hdr->inode, false); | |
1045 | ||
1046 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
1047 | dprintk("%s Reset task %5u for i/o through MDS " | |
1048 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1049 | hdr->task.tk_pid, | |
1050 | hdr->inode->i_sb->s_id, | |
1051 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1052 | hdr->args.count, | |
1053 | (unsigned long long)hdr->args.offset); | |
1054 | ||
1055 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | static int ff_layout_async_handle_error_v4(struct rpc_task *task, | |
1060 | struct nfs4_state *state, | |
1061 | struct nfs_client *clp, | |
1062 | struct pnfs_layout_segment *lseg, | |
1063 | int idx) | |
1064 | { | |
1065 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
1066 | struct inode *inode = lo->plh_inode; | |
1067 | struct nfs_server *mds_server = NFS_SERVER(inode); | |
1068 | ||
1069 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1070 | struct nfs_client *mds_client = mds_server->nfs_client; | |
1071 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; | |
1072 | ||
1073 | if (task->tk_status >= 0) | |
1074 | return 0; | |
1075 | ||
1076 | switch (task->tk_status) { | |
1077 | /* MDS state errors */ | |
1078 | case -NFS4ERR_DELEG_REVOKED: | |
1079 | case -NFS4ERR_ADMIN_REVOKED: | |
1080 | case -NFS4ERR_BAD_STATEID: | |
1081 | if (state == NULL) | |
1082 | break; | |
1083 | nfs_remove_bad_delegation(state->inode); | |
1084 | case -NFS4ERR_OPENMODE: | |
1085 | if (state == NULL) | |
1086 | break; | |
1087 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
1088 | goto out_bad_stateid; | |
1089 | goto wait_on_recovery; | |
1090 | case -NFS4ERR_EXPIRED: | |
1091 | if (state != NULL) { | |
1092 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
1093 | goto out_bad_stateid; | |
1094 | } | |
1095 | nfs4_schedule_lease_recovery(mds_client); | |
1096 | goto wait_on_recovery; | |
1097 | /* DS session errors */ | |
1098 | case -NFS4ERR_BADSESSION: | |
1099 | case -NFS4ERR_BADSLOT: | |
1100 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1101 | case -NFS4ERR_DEADSESSION: | |
1102 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1103 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1104 | case -NFS4ERR_SEQ_MISORDERED: | |
1105 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
1106 | "flags 0x%x\n", __func__, task->tk_status, | |
1107 | clp->cl_exchange_flags); | |
1108 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); | |
1109 | break; | |
1110 | case -NFS4ERR_DELAY: | |
1111 | case -NFS4ERR_GRACE: | |
1112 | rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); | |
1113 | break; | |
1114 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
1115 | break; | |
1116 | /* Invalidate Layout errors */ | |
1117 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
1118 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
1119 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
1120 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
1121 | case -NFS4ERR_FHEXPIRED: | |
1122 | case -NFS4ERR_WRONG_TYPE: | |
1123 | dprintk("%s Invalid layout error %d\n", __func__, | |
1124 | task->tk_status); | |
1125 | /* | |
1126 | * Destroy layout so new i/o will get a new layout. | |
1127 | * Layout will not be destroyed until all current lseg | |
1128 | * references are put. Mark layout as invalid to resend failed | |
1129 | * i/o and all i/o waiting on the slot table to the MDS until | |
1130 | * layout is destroyed and a new valid layout is obtained. | |
1131 | */ | |
1132 | pnfs_destroy_layout(NFS_I(inode)); | |
1133 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
1134 | goto reset; | |
1135 | /* RPC connection errors */ | |
1136 | case -ECONNREFUSED: | |
1137 | case -EHOSTDOWN: | |
1138 | case -EHOSTUNREACH: | |
1139 | case -ENETUNREACH: | |
1140 | case -EIO: | |
1141 | case -ETIMEDOUT: | |
1142 | case -EPIPE: | |
1143 | dprintk("%s DS connection error %d\n", __func__, | |
1144 | task->tk_status); | |
1145 | nfs4_mark_deviceid_unavailable(devid); | |
1146 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
1147 | /* fall through */ | |
1148 | default: | |
3b13b4b3 | 1149 | if (ff_layout_avoid_mds_available_ds(lseg)) |
d67ae825 TH |
1150 | return -NFS4ERR_RESET_TO_PNFS; |
1151 | reset: | |
1152 | dprintk("%s Retry through MDS. Error %d\n", __func__, | |
1153 | task->tk_status); | |
1154 | return -NFS4ERR_RESET_TO_MDS; | |
1155 | } | |
1156 | out: | |
1157 | task->tk_status = 0; | |
1158 | return -EAGAIN; | |
1159 | out_bad_stateid: | |
1160 | task->tk_status = -EIO; | |
1161 | return 0; | |
1162 | wait_on_recovery: | |
1163 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
1164 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
1165 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
1166 | goto out; | |
1167 | } | |
1168 | ||
1169 | /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ | |
1170 | static int ff_layout_async_handle_error_v3(struct rpc_task *task, | |
1171 | struct pnfs_layout_segment *lseg, | |
1172 | int idx) | |
1173 | { | |
1174 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1175 | ||
1176 | if (task->tk_status >= 0) | |
1177 | return 0; | |
1178 | ||
90816d1d TM |
1179 | switch (task->tk_status) { |
1180 | /* File access problems. Don't mark the device as unavailable */ | |
1181 | case -EACCES: | |
1182 | case -ESTALE: | |
1183 | case -EISDIR: | |
1184 | case -EBADHANDLE: | |
1185 | case -ELOOP: | |
1186 | case -ENOSPC: | |
1187 | break; | |
1188 | case -EJUKEBOX: | |
1189 | nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); | |
1190 | goto out_retry; | |
1191 | default: | |
d67ae825 TH |
1192 | dprintk("%s DS connection error %d\n", __func__, |
1193 | task->tk_status); | |
1194 | nfs4_mark_deviceid_unavailable(devid); | |
d67ae825 | 1195 | } |
90816d1d TM |
1196 | /* FIXME: Need to prevent infinite looping here. */ |
1197 | return -NFS4ERR_RESET_TO_PNFS; | |
1198 | out_retry: | |
d67ae825 | 1199 | task->tk_status = 0; |
7eeea167 | 1200 | rpc_restart_call_prepare(task); |
d67ae825 TH |
1201 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
1202 | return -EAGAIN; | |
1203 | } | |
1204 | ||
1205 | static int ff_layout_async_handle_error(struct rpc_task *task, | |
1206 | struct nfs4_state *state, | |
1207 | struct nfs_client *clp, | |
1208 | struct pnfs_layout_segment *lseg, | |
1209 | int idx) | |
1210 | { | |
1211 | int vers = clp->cl_nfs_mod->rpc_vers->number; | |
1212 | ||
1213 | switch (vers) { | |
1214 | case 3: | |
1215 | return ff_layout_async_handle_error_v3(task, lseg, idx); | |
1216 | case 4: | |
1217 | return ff_layout_async_handle_error_v4(task, state, clp, | |
1218 | lseg, idx); | |
1219 | default: | |
1220 | /* should never happen */ | |
1221 | WARN_ON_ONCE(1); | |
1222 | return 0; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, | |
1227 | int idx, u64 offset, u64 length, | |
dd52128a | 1228 | u32 status, int opnum, int error) |
d67ae825 TH |
1229 | { |
1230 | struct nfs4_ff_layout_mirror *mirror; | |
1231 | int err; | |
1232 | ||
dd52128a TM |
1233 | if (status == 0) { |
1234 | switch (error) { | |
1235 | case -ETIMEDOUT: | |
1236 | case -EPFNOSUPPORT: | |
1237 | case -EPROTONOSUPPORT: | |
1238 | case -EOPNOTSUPP: | |
1239 | case -ECONNREFUSED: | |
1240 | case -ECONNRESET: | |
1241 | case -EHOSTDOWN: | |
1242 | case -EHOSTUNREACH: | |
1243 | case -ENETUNREACH: | |
1244 | case -EADDRINUSE: | |
1245 | case -ENOBUFS: | |
1246 | case -EPIPE: | |
1247 | case -EPERM: | |
1248 | status = NFS4ERR_NXIO; | |
1249 | break; | |
1250 | case -EACCES: | |
1251 | status = NFS4ERR_ACCESS; | |
1252 | break; | |
1253 | default: | |
1254 | return; | |
1255 | } | |
1256 | } | |
1257 | ||
c22eeb86 PT |
1258 | switch (status) { |
1259 | case NFS4ERR_DELAY: | |
1260 | case NFS4ERR_GRACE: | |
1261 | return; | |
1262 | default: | |
1263 | break; | |
1264 | } | |
1265 | ||
d67ae825 TH |
1266 | mirror = FF_LAYOUT_COMP(lseg, idx); |
1267 | err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), | |
1268 | mirror, offset, length, status, opnum, | |
1269 | GFP_NOIO); | |
f95c03b2 | 1270 | pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, lseg); |
d67ae825 TH |
1271 | dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); |
1272 | } | |
1273 | ||
1274 | /* NFS_PROTO call done callback routines */ | |
d67ae825 TH |
1275 | static int ff_layout_read_done_cb(struct rpc_task *task, |
1276 | struct nfs_pgio_header *hdr) | |
1277 | { | |
d67ae825 TH |
1278 | int err; |
1279 | ||
1280 | trace_nfs4_pnfs_read(hdr, task->tk_status); | |
dd52128a | 1281 | if (task->tk_status < 0) |
d67ae825 TH |
1282 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1283 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1284 | hdr->res.op_status, OP_READ, |
1285 | task->tk_status); | |
d67ae825 TH |
1286 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1287 | hdr->ds_clp, hdr->lseg, | |
1288 | hdr->pgio_mirror_idx); | |
1289 | ||
1290 | switch (err) { | |
1291 | case -NFS4ERR_RESET_TO_PNFS: | |
13544412 TM |
1292 | if (ff_layout_choose_best_ds_for_read(hdr->lseg, |
1293 | hdr->pgio_mirror_idx + 1, | |
1294 | &hdr->pgio_mirror_idx)) | |
1295 | goto out_eagain; | |
d67ae825 TH |
1296 | pnfs_read_resend_pnfs(hdr); |
1297 | return task->tk_status; | |
1298 | case -NFS4ERR_RESET_TO_MDS: | |
d67ae825 TH |
1299 | ff_layout_reset_read(hdr); |
1300 | return task->tk_status; | |
1301 | case -EAGAIN: | |
13544412 | 1302 | goto out_eagain; |
d67ae825 TH |
1303 | } |
1304 | ||
1305 | return 0; | |
13544412 TM |
1306 | out_eagain: |
1307 | rpc_restart_call_prepare(task); | |
1308 | return -EAGAIN; | |
d67ae825 TH |
1309 | } |
1310 | ||
c0f5f505 TM |
1311 | static bool |
1312 | ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) | |
1313 | { | |
1314 | return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); | |
1315 | } | |
1316 | ||
d67ae825 TH |
1317 | /* |
1318 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
1319 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
1320 | * rfc5661 is not clear about which credential should be used. | |
1321 | * | |
1322 | * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so | |
1323 | * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 | |
1324 | * we always send layoutcommit after DS writes. | |
1325 | */ | |
1326 | static void | |
bc28e1c2 TM |
1327 | ff_layout_set_layoutcommit(struct inode *inode, |
1328 | struct pnfs_layout_segment *lseg, | |
1329 | loff_t end_offset) | |
d67ae825 | 1330 | { |
bc28e1c2 | 1331 | if (!ff_layout_need_layoutcommit(lseg)) |
c0f5f505 TM |
1332 | return; |
1333 | ||
bc28e1c2 TM |
1334 | pnfs_set_layoutcommit(inode, lseg, end_offset); |
1335 | dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino, | |
1336 | (unsigned long long) NFS_I(inode)->layout->plh_lwb); | |
d67ae825 TH |
1337 | } |
1338 | ||
1339 | static bool | |
75bf47eb | 1340 | ff_layout_device_unavailable(struct pnfs_layout_segment *lseg, int idx) |
d67ae825 TH |
1341 | { |
1342 | /* No mirroring for now */ | |
1343 | struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1344 | ||
1345 | return ff_layout_test_devid_unavailable(node); | |
1346 | } | |
1347 | ||
37e9ed22 TM |
1348 | static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, |
1349 | struct nfs_pgio_header *hdr) | |
d67ae825 | 1350 | { |
37e9ed22 TM |
1351 | if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
1352 | return; | |
0b7baf94 | 1353 | nfs4_ff_layout_stat_io_start_read(hdr->inode, |
abcb7bfc | 1354 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1355 | hdr->args.count, |
1356 | task->tk_start); | |
37e9ed22 TM |
1357 | } |
1358 | ||
1359 | static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, | |
1360 | struct nfs_pgio_header *hdr) | |
1361 | { | |
1362 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) | |
1363 | return; | |
1364 | nfs4_ff_layout_stat_io_end_read(task, | |
1365 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1366 | hdr->args.count, | |
1367 | hdr->res.count); | |
1368 | } | |
abcb7bfc | 1369 | |
37e9ed22 TM |
1370 | static int ff_layout_read_prepare_common(struct rpc_task *task, |
1371 | struct nfs_pgio_header *hdr) | |
1372 | { | |
d67ae825 TH |
1373 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1374 | rpc_exit(task, -EIO); | |
1375 | return -EIO; | |
1376 | } | |
75bf47eb TM |
1377 | if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { |
1378 | rpc_exit(task, -EHOSTDOWN); | |
d67ae825 TH |
1379 | return -EAGAIN; |
1380 | } | |
d67ae825 | 1381 | |
37e9ed22 | 1382 | ff_layout_read_record_layoutstats_start(task, hdr); |
d67ae825 TH |
1383 | return 0; |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Call ops for the async read/write cases | |
1388 | * In the case of dense layouts, the offset needs to be reset to its | |
1389 | * original value. | |
1390 | */ | |
1391 | static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) | |
1392 | { | |
1393 | struct nfs_pgio_header *hdr = data; | |
1394 | ||
1395 | if (ff_layout_read_prepare_common(task, hdr)) | |
1396 | return; | |
1397 | ||
1398 | rpc_call_start(task); | |
1399 | } | |
1400 | ||
1401 | static int ff_layout_setup_sequence(struct nfs_client *ds_clp, | |
1402 | struct nfs4_sequence_args *args, | |
1403 | struct nfs4_sequence_res *res, | |
1404 | struct rpc_task *task) | |
1405 | { | |
1406 | if (ds_clp->cl_session) | |
1407 | return nfs41_setup_sequence(ds_clp->cl_session, | |
1408 | args, | |
1409 | res, | |
1410 | task); | |
1411 | return nfs40_setup_sequence(ds_clp->cl_slot_tbl, | |
1412 | args, | |
1413 | res, | |
1414 | task); | |
1415 | } | |
1416 | ||
1417 | static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) | |
1418 | { | |
1419 | struct nfs_pgio_header *hdr = data; | |
1420 | ||
d67ae825 TH |
1421 | if (ff_layout_setup_sequence(hdr->ds_clp, |
1422 | &hdr->args.seq_args, | |
1423 | &hdr->res.seq_res, | |
1424 | task)) | |
1425 | return; | |
1426 | ||
abcb7bfc TM |
1427 | if (ff_layout_read_prepare_common(task, hdr)) |
1428 | return; | |
1429 | ||
d67ae825 TH |
1430 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1431 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
1432 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1433 | } | |
1434 | ||
1435 | static void ff_layout_read_call_done(struct rpc_task *task, void *data) | |
1436 | { | |
1437 | struct nfs_pgio_header *hdr = data; | |
1438 | ||
1439 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
1440 | ||
1441 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
1442 | task->tk_status == 0) { | |
1443 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1444 | return; | |
1445 | } | |
1446 | ||
1447 | /* Note this may cause RPC to be resent */ | |
1448 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1449 | } | |
1450 | ||
1451 | static void ff_layout_read_count_stats(struct rpc_task *task, void *data) | |
1452 | { | |
1453 | struct nfs_pgio_header *hdr = data; | |
1454 | ||
37e9ed22 | 1455 | ff_layout_read_record_layoutstats_done(task, hdr); |
d67ae825 TH |
1456 | rpc_count_iostats_metrics(task, |
1457 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); | |
1458 | } | |
1459 | ||
4d0ac221 TM |
1460 | static void ff_layout_read_release(void *data) |
1461 | { | |
1462 | struct nfs_pgio_header *hdr = data; | |
1463 | ||
1464 | ff_layout_read_record_layoutstats_done(&hdr->task, hdr); | |
1465 | pnfs_generic_rw_release(data); | |
1466 | } | |
1467 | ||
1468 | ||
d67ae825 TH |
1469 | static int ff_layout_write_done_cb(struct rpc_task *task, |
1470 | struct nfs_pgio_header *hdr) | |
1471 | { | |
2e18d4d8 | 1472 | loff_t end_offs = 0; |
d67ae825 TH |
1473 | int err; |
1474 | ||
1475 | trace_nfs4_pnfs_write(hdr, task->tk_status); | |
dd52128a | 1476 | if (task->tk_status < 0) |
d67ae825 TH |
1477 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1478 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1479 | hdr->res.op_status, OP_WRITE, |
1480 | task->tk_status); | |
d67ae825 TH |
1481 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1482 | hdr->ds_clp, hdr->lseg, | |
1483 | hdr->pgio_mirror_idx); | |
1484 | ||
1485 | switch (err) { | |
1486 | case -NFS4ERR_RESET_TO_PNFS: | |
7cc8c5cd TM |
1487 | ff_layout_reset_write(hdr, true); |
1488 | return task->tk_status; | |
d67ae825 | 1489 | case -NFS4ERR_RESET_TO_MDS: |
7cc8c5cd | 1490 | ff_layout_reset_write(hdr, false); |
d67ae825 TH |
1491 | return task->tk_status; |
1492 | case -EAGAIN: | |
d67ae825 TH |
1493 | return -EAGAIN; |
1494 | } | |
1495 | ||
1496 | if (hdr->res.verf->committed == NFS_FILE_SYNC || | |
1497 | hdr->res.verf->committed == NFS_DATA_SYNC) | |
2e18d4d8 TM |
1498 | end_offs = hdr->mds_offset + (loff_t)hdr->res.count; |
1499 | ||
1500 | /* Note: if the write is unstable, don't set end_offs until commit */ | |
1501 | ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); | |
d67ae825 | 1502 | |
54204010 PT |
1503 | /* zero out fattr since we don't care DS attr at all */ |
1504 | hdr->fattr.valid = 0; | |
69f230d9 PT |
1505 | if (task->tk_status >= 0) |
1506 | nfs_writeback_update_inode(hdr); | |
1507 | ||
d67ae825 TH |
1508 | return 0; |
1509 | } | |
1510 | ||
1511 | static int ff_layout_commit_done_cb(struct rpc_task *task, | |
1512 | struct nfs_commit_data *data) | |
1513 | { | |
d67ae825 TH |
1514 | int err; |
1515 | ||
1516 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); | |
dd52128a | 1517 | if (task->tk_status < 0) |
d67ae825 TH |
1518 | ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, |
1519 | data->args.offset, data->args.count, | |
dd52128a TM |
1520 | data->res.op_status, OP_COMMIT, |
1521 | task->tk_status); | |
d67ae825 TH |
1522 | err = ff_layout_async_handle_error(task, NULL, data->ds_clp, |
1523 | data->lseg, data->ds_commit_index); | |
1524 | ||
1525 | switch (err) { | |
1526 | case -NFS4ERR_RESET_TO_PNFS: | |
7cc8c5cd TM |
1527 | pnfs_generic_prepare_to_resend_writes(data); |
1528 | return -EAGAIN; | |
d67ae825 | 1529 | case -NFS4ERR_RESET_TO_MDS: |
d67ae825 TH |
1530 | pnfs_generic_prepare_to_resend_writes(data); |
1531 | return -EAGAIN; | |
1532 | case -EAGAIN: | |
1533 | rpc_restart_call_prepare(task); | |
1534 | return -EAGAIN; | |
1535 | } | |
1536 | ||
bc28e1c2 | 1537 | ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); |
d67ae825 TH |
1538 | |
1539 | return 0; | |
1540 | } | |
1541 | ||
37e9ed22 TM |
1542 | static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, |
1543 | struct nfs_pgio_header *hdr) | |
d67ae825 | 1544 | { |
37e9ed22 TM |
1545 | if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
1546 | return; | |
0b7baf94 | 1547 | nfs4_ff_layout_stat_io_start_write(hdr->inode, |
abcb7bfc | 1548 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1549 | hdr->args.count, |
1550 | task->tk_start); | |
37e9ed22 TM |
1551 | } |
1552 | ||
1553 | static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, | |
1554 | struct nfs_pgio_header *hdr) | |
1555 | { | |
1556 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) | |
1557 | return; | |
1558 | nfs4_ff_layout_stat_io_end_write(task, | |
1559 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1560 | hdr->args.count, hdr->res.count, | |
1561 | hdr->res.verf->committed); | |
1562 | } | |
abcb7bfc | 1563 | |
37e9ed22 TM |
1564 | static int ff_layout_write_prepare_common(struct rpc_task *task, |
1565 | struct nfs_pgio_header *hdr) | |
1566 | { | |
d67ae825 TH |
1567 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1568 | rpc_exit(task, -EIO); | |
1569 | return -EIO; | |
1570 | } | |
1571 | ||
75bf47eb TM |
1572 | if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { |
1573 | rpc_exit(task, -EHOSTDOWN); | |
d67ae825 TH |
1574 | return -EAGAIN; |
1575 | } | |
1576 | ||
37e9ed22 | 1577 | ff_layout_write_record_layoutstats_start(task, hdr); |
d67ae825 TH |
1578 | return 0; |
1579 | } | |
1580 | ||
1581 | static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) | |
1582 | { | |
1583 | struct nfs_pgio_header *hdr = data; | |
1584 | ||
1585 | if (ff_layout_write_prepare_common(task, hdr)) | |
1586 | return; | |
1587 | ||
1588 | rpc_call_start(task); | |
1589 | } | |
1590 | ||
1591 | static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) | |
1592 | { | |
1593 | struct nfs_pgio_header *hdr = data; | |
1594 | ||
d67ae825 TH |
1595 | if (ff_layout_setup_sequence(hdr->ds_clp, |
1596 | &hdr->args.seq_args, | |
1597 | &hdr->res.seq_res, | |
1598 | task)) | |
1599 | return; | |
1600 | ||
abcb7bfc TM |
1601 | if (ff_layout_write_prepare_common(task, hdr)) |
1602 | return; | |
1603 | ||
d67ae825 TH |
1604 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1605 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
1606 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1607 | } | |
1608 | ||
1609 | static void ff_layout_write_call_done(struct rpc_task *task, void *data) | |
1610 | { | |
1611 | struct nfs_pgio_header *hdr = data; | |
1612 | ||
1613 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
1614 | task->tk_status == 0) { | |
1615 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1616 | return; | |
1617 | } | |
1618 | ||
1619 | /* Note this may cause RPC to be resent */ | |
1620 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1621 | } | |
1622 | ||
1623 | static void ff_layout_write_count_stats(struct rpc_task *task, void *data) | |
1624 | { | |
1625 | struct nfs_pgio_header *hdr = data; | |
1626 | ||
37e9ed22 | 1627 | ff_layout_write_record_layoutstats_done(task, hdr); |
d67ae825 TH |
1628 | rpc_count_iostats_metrics(task, |
1629 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); | |
1630 | } | |
1631 | ||
4d0ac221 TM |
1632 | static void ff_layout_write_release(void *data) |
1633 | { | |
1634 | struct nfs_pgio_header *hdr = data; | |
1635 | ||
1636 | ff_layout_write_record_layoutstats_done(&hdr->task, hdr); | |
1637 | pnfs_generic_rw_release(data); | |
1638 | } | |
1639 | ||
37e9ed22 | 1640 | static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, |
abcb7bfc TM |
1641 | struct nfs_commit_data *cdata) |
1642 | { | |
37e9ed22 TM |
1643 | if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) |
1644 | return; | |
0b7baf94 | 1645 | nfs4_ff_layout_stat_io_start_write(cdata->inode, |
abcb7bfc | 1646 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), |
e76d28dd | 1647 | 0, task->tk_start); |
abcb7bfc TM |
1648 | } |
1649 | ||
37e9ed22 TM |
1650 | static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, |
1651 | struct nfs_commit_data *cdata) | |
1652 | { | |
1653 | struct nfs_page *req; | |
1654 | __u64 count = 0; | |
1655 | ||
1656 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) | |
1657 | return; | |
1658 | ||
1659 | if (task->tk_status == 0) { | |
1660 | list_for_each_entry(req, &cdata->pages, wb_list) | |
1661 | count += req->wb_bytes; | |
1662 | } | |
1663 | nfs4_ff_layout_stat_io_end_write(task, | |
1664 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), | |
1665 | count, count, NFS_FILE_SYNC); | |
1666 | } | |
1667 | ||
1668 | static void ff_layout_commit_prepare_common(struct rpc_task *task, | |
1669 | struct nfs_commit_data *cdata) | |
1670 | { | |
1671 | ff_layout_commit_record_layoutstats_start(task, cdata); | |
1672 | } | |
1673 | ||
d67ae825 TH |
1674 | static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) |
1675 | { | |
abcb7bfc | 1676 | ff_layout_commit_prepare_common(task, data); |
d67ae825 TH |
1677 | rpc_call_start(task); |
1678 | } | |
1679 | ||
1680 | static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) | |
1681 | { | |
1682 | struct nfs_commit_data *wdata = data; | |
1683 | ||
abcb7bfc | 1684 | if (ff_layout_setup_sequence(wdata->ds_clp, |
d67ae825 TH |
1685 | &wdata->args.seq_args, |
1686 | &wdata->res.seq_res, | |
abcb7bfc TM |
1687 | task)) |
1688 | return; | |
1689 | ff_layout_commit_prepare_common(task, data); | |
1690 | } | |
1691 | ||
1692 | static void ff_layout_commit_done(struct rpc_task *task, void *data) | |
141b9b59 PT |
1693 | { |
1694 | pnfs_generic_write_commit_done(task, data); | |
1695 | } | |
1696 | ||
1697 | static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) | |
abcb7bfc TM |
1698 | { |
1699 | struct nfs_commit_data *cdata = data; | |
abcb7bfc | 1700 | |
37e9ed22 | 1701 | ff_layout_commit_record_layoutstats_done(task, cdata); |
d67ae825 TH |
1702 | rpc_count_iostats_metrics(task, |
1703 | &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); | |
1704 | } | |
1705 | ||
4d0ac221 TM |
1706 | static void ff_layout_commit_release(void *data) |
1707 | { | |
1708 | struct nfs_commit_data *cdata = data; | |
1709 | ||
1710 | ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); | |
1711 | pnfs_generic_commit_release(data); | |
1712 | } | |
1713 | ||
d67ae825 TH |
1714 | static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { |
1715 | .rpc_call_prepare = ff_layout_read_prepare_v3, | |
1716 | .rpc_call_done = ff_layout_read_call_done, | |
1717 | .rpc_count_stats = ff_layout_read_count_stats, | |
4d0ac221 | 1718 | .rpc_release = ff_layout_read_release, |
d67ae825 TH |
1719 | }; |
1720 | ||
1721 | static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { | |
1722 | .rpc_call_prepare = ff_layout_read_prepare_v4, | |
1723 | .rpc_call_done = ff_layout_read_call_done, | |
1724 | .rpc_count_stats = ff_layout_read_count_stats, | |
4d0ac221 | 1725 | .rpc_release = ff_layout_read_release, |
d67ae825 TH |
1726 | }; |
1727 | ||
1728 | static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { | |
1729 | .rpc_call_prepare = ff_layout_write_prepare_v3, | |
1730 | .rpc_call_done = ff_layout_write_call_done, | |
1731 | .rpc_count_stats = ff_layout_write_count_stats, | |
4d0ac221 | 1732 | .rpc_release = ff_layout_write_release, |
d67ae825 TH |
1733 | }; |
1734 | ||
1735 | static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { | |
1736 | .rpc_call_prepare = ff_layout_write_prepare_v4, | |
1737 | .rpc_call_done = ff_layout_write_call_done, | |
1738 | .rpc_count_stats = ff_layout_write_count_stats, | |
4d0ac221 | 1739 | .rpc_release = ff_layout_write_release, |
d67ae825 TH |
1740 | }; |
1741 | ||
1742 | static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { | |
1743 | .rpc_call_prepare = ff_layout_commit_prepare_v3, | |
abcb7bfc | 1744 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 | 1745 | .rpc_count_stats = ff_layout_commit_count_stats, |
4d0ac221 | 1746 | .rpc_release = ff_layout_commit_release, |
d67ae825 TH |
1747 | }; |
1748 | ||
1749 | static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { | |
1750 | .rpc_call_prepare = ff_layout_commit_prepare_v4, | |
abcb7bfc | 1751 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 | 1752 | .rpc_count_stats = ff_layout_commit_count_stats, |
4d0ac221 | 1753 | .rpc_release = ff_layout_commit_release, |
d67ae825 TH |
1754 | }; |
1755 | ||
1756 | static enum pnfs_try_status | |
1757 | ff_layout_read_pagelist(struct nfs_pgio_header *hdr) | |
1758 | { | |
1759 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1760 | struct nfs4_pnfs_ds *ds; | |
1761 | struct rpc_clnt *ds_clnt; | |
1762 | struct rpc_cred *ds_cred; | |
1763 | loff_t offset = hdr->args.offset; | |
1764 | u32 idx = hdr->pgio_mirror_idx; | |
1765 | int vers; | |
1766 | struct nfs_fh *fh; | |
1767 | ||
1768 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
1769 | __func__, hdr->inode->i_ino, | |
1770 | hdr->args.pgbase, (size_t)hdr->args.count, offset); | |
1771 | ||
1772 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, false); | |
1773 | if (!ds) | |
1774 | goto out_failed; | |
1775 | ||
1776 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1777 | hdr->inode); | |
1778 | if (IS_ERR(ds_clnt)) | |
1779 | goto out_failed; | |
1780 | ||
1781 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
57f3f4c0 | 1782 | if (!ds_cred) |
d67ae825 TH |
1783 | goto out_failed; |
1784 | ||
1785 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1786 | ||
1787 | dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, | |
1788 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers); | |
1789 | ||
75bf47eb | 1790 | hdr->pgio_done_cb = ff_layout_read_done_cb; |
d67ae825 TH |
1791 | atomic_inc(&ds->ds_clp->cl_count); |
1792 | hdr->ds_clp = ds->ds_clp; | |
1793 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1794 | if (fh) | |
1795 | hdr->args.fh = fh; | |
d67ae825 TH |
1796 | /* |
1797 | * Note that if we ever decide to split across DSes, | |
1798 | * then we may need to handle dense-like offsets. | |
1799 | */ | |
1800 | hdr->args.offset = offset; | |
1801 | hdr->mds_offset = offset; | |
1802 | ||
1803 | /* Perform an asynchronous read to ds */ | |
1804 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1805 | vers == 3 ? &ff_layout_read_call_ops_v3 : | |
1806 | &ff_layout_read_call_ops_v4, | |
1807 | 0, RPC_TASK_SOFTCONN); | |
57f3f4c0 | 1808 | put_rpccred(ds_cred); |
d67ae825 TH |
1809 | return PNFS_ATTEMPTED; |
1810 | ||
1811 | out_failed: | |
3b13b4b3 | 1812 | if (ff_layout_avoid_mds_available_ds(lseg)) |
d67ae825 TH |
1813 | return PNFS_TRY_AGAIN; |
1814 | return PNFS_NOT_ATTEMPTED; | |
1815 | } | |
1816 | ||
1817 | /* Perform async writes. */ | |
1818 | static enum pnfs_try_status | |
1819 | ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) | |
1820 | { | |
1821 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1822 | struct nfs4_pnfs_ds *ds; | |
1823 | struct rpc_clnt *ds_clnt; | |
1824 | struct rpc_cred *ds_cred; | |
1825 | loff_t offset = hdr->args.offset; | |
1826 | int vers; | |
1827 | struct nfs_fh *fh; | |
1828 | int idx = hdr->pgio_mirror_idx; | |
1829 | ||
1830 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1831 | if (!ds) | |
1832 | return PNFS_NOT_ATTEMPTED; | |
1833 | ||
1834 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1835 | hdr->inode); | |
1836 | if (IS_ERR(ds_clnt)) | |
1837 | return PNFS_NOT_ATTEMPTED; | |
1838 | ||
1839 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
57f3f4c0 | 1840 | if (!ds_cred) |
d67ae825 TH |
1841 | return PNFS_NOT_ATTEMPTED; |
1842 | ||
1843 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1844 | ||
1845 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n", | |
1846 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, | |
1847 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), | |
1848 | vers); | |
1849 | ||
1850 | hdr->pgio_done_cb = ff_layout_write_done_cb; | |
1851 | atomic_inc(&ds->ds_clp->cl_count); | |
1852 | hdr->ds_clp = ds->ds_clp; | |
1853 | hdr->ds_commit_idx = idx; | |
1854 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1855 | if (fh) | |
1856 | hdr->args.fh = fh; | |
1857 | ||
1858 | /* | |
1859 | * Note that if we ever decide to split across DSes, | |
1860 | * then we may need to handle dense-like offsets. | |
1861 | */ | |
1862 | hdr->args.offset = offset; | |
1863 | ||
1864 | /* Perform an asynchronous write */ | |
1865 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1866 | vers == 3 ? &ff_layout_write_call_ops_v3 : | |
1867 | &ff_layout_write_call_ops_v4, | |
1868 | sync, RPC_TASK_SOFTCONN); | |
57f3f4c0 | 1869 | put_rpccred(ds_cred); |
d67ae825 TH |
1870 | return PNFS_ATTEMPTED; |
1871 | } | |
1872 | ||
d67ae825 TH |
1873 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1874 | { | |
1875 | return i; | |
1876 | } | |
1877 | ||
1878 | static struct nfs_fh * | |
1879 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1880 | { | |
1881 | struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); | |
1882 | ||
1883 | /* FIXME: Assume that there is only one NFS version available | |
1884 | * for the DS. | |
1885 | */ | |
1886 | return &flseg->mirror_array[i]->fh_versions[0]; | |
1887 | } | |
1888 | ||
1889 | static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) | |
1890 | { | |
1891 | struct pnfs_layout_segment *lseg = data->lseg; | |
1892 | struct nfs4_pnfs_ds *ds; | |
1893 | struct rpc_clnt *ds_clnt; | |
1894 | struct rpc_cred *ds_cred; | |
1895 | u32 idx; | |
57f3f4c0 | 1896 | int vers, ret; |
d67ae825 TH |
1897 | struct nfs_fh *fh; |
1898 | ||
1899 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1900 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1901 | if (!ds) | |
1902 | goto out_err; | |
1903 | ||
1904 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1905 | data->inode); | |
1906 | if (IS_ERR(ds_clnt)) | |
1907 | goto out_err; | |
1908 | ||
1909 | ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred); | |
57f3f4c0 | 1910 | if (!ds_cred) |
d67ae825 TH |
1911 | goto out_err; |
1912 | ||
1913 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1914 | ||
1915 | dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, | |
1916 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count), | |
1917 | vers); | |
1918 | data->commit_done_cb = ff_layout_commit_done_cb; | |
1919 | data->cred = ds_cred; | |
1920 | atomic_inc(&ds->ds_clp->cl_count); | |
1921 | data->ds_clp = ds->ds_clp; | |
1922 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1923 | if (fh) | |
1924 | data->args.fh = fh; | |
abcb7bfc | 1925 | |
57f3f4c0 | 1926 | ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, |
d67ae825 TH |
1927 | vers == 3 ? &ff_layout_commit_call_ops_v3 : |
1928 | &ff_layout_commit_call_ops_v4, | |
1929 | how, RPC_TASK_SOFTCONN); | |
57f3f4c0 JL |
1930 | put_rpccred(ds_cred); |
1931 | return ret; | |
d67ae825 TH |
1932 | out_err: |
1933 | pnfs_generic_prepare_to_resend_writes(data); | |
1934 | pnfs_generic_commit_release(data); | |
1935 | return -EAGAIN; | |
1936 | } | |
1937 | ||
1938 | static int | |
1939 | ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
1940 | int how, struct nfs_commit_info *cinfo) | |
1941 | { | |
1942 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, | |
1943 | ff_layout_initiate_commit); | |
1944 | } | |
1945 | ||
1946 | static struct pnfs_ds_commit_info * | |
1947 | ff_layout_get_ds_info(struct inode *inode) | |
1948 | { | |
1949 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; | |
1950 | ||
1951 | if (layout == NULL) | |
1952 | return NULL; | |
1953 | ||
1954 | return &FF_LAYOUT_FROM_HDR(layout)->commit_info; | |
1955 | } | |
1956 | ||
1957 | static void | |
fc87701b | 1958 | ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) |
d67ae825 TH |
1959 | { |
1960 | nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, | |
1961 | id_node)); | |
1962 | } | |
1963 | ||
1964 | static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo, | |
1965 | struct xdr_stream *xdr, | |
1966 | const struct nfs4_layoutreturn_args *args) | |
1967 | { | |
1968 | struct pnfs_layout_hdr *hdr = &flo->generic_hdr; | |
1969 | __be32 *start; | |
1970 | int count = 0, ret = 0; | |
1971 | ||
1972 | start = xdr_reserve_space(xdr, 4); | |
1973 | if (unlikely(!start)) | |
1974 | return -E2BIG; | |
1975 | ||
1976 | /* This assume we always return _ALL_ layouts */ | |
1977 | spin_lock(&hdr->plh_inode->i_lock); | |
1978 | ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range); | |
1979 | spin_unlock(&hdr->plh_inode->i_lock); | |
1980 | ||
1981 | *start = cpu_to_be32(count); | |
1982 | ||
1983 | return ret; | |
1984 | } | |
1985 | ||
1986 | /* report nothing for now */ | |
1987 | static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo, | |
1988 | struct xdr_stream *xdr, | |
1989 | const struct nfs4_layoutreturn_args *args) | |
1990 | { | |
1991 | __be32 *p; | |
1992 | ||
1993 | p = xdr_reserve_space(xdr, 4); | |
1994 | if (likely(p)) | |
1995 | *p = cpu_to_be32(0); | |
1996 | } | |
1997 | ||
1998 | static struct nfs4_deviceid_node * | |
1999 | ff_layout_alloc_deviceid_node(struct nfs_server *server, | |
2000 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
2001 | { | |
2002 | struct nfs4_ff_layout_ds *dsaddr; | |
2003 | ||
2004 | dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); | |
2005 | if (!dsaddr) | |
2006 | return NULL; | |
2007 | return &dsaddr->id_node; | |
2008 | } | |
2009 | ||
2010 | static void | |
2011 | ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo, | |
2012 | struct xdr_stream *xdr, | |
2013 | const struct nfs4_layoutreturn_args *args) | |
2014 | { | |
2015 | struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo); | |
2016 | __be32 *start; | |
2017 | ||
2018 | dprintk("%s: Begin\n", __func__); | |
2019 | start = xdr_reserve_space(xdr, 4); | |
2020 | BUG_ON(!start); | |
2021 | ||
082fa37d | 2022 | ff_layout_encode_ioerr(flo, xdr, args); |
d67ae825 | 2023 | ff_layout_encode_iostats(flo, xdr, args); |
082fa37d | 2024 | |
d67ae825 TH |
2025 | *start = cpu_to_be32((xdr->p - start - 1) * 4); |
2026 | dprintk("%s: Return\n", __func__); | |
2027 | } | |
2028 | ||
27c43064 PT |
2029 | static int |
2030 | ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) | |
2031 | { | |
2032 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
2033 | ||
2034 | return snprintf(buf, buflen, "%pI4", &sin->sin_addr); | |
2035 | } | |
2036 | ||
2037 | static size_t | |
2038 | ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, | |
2039 | const int buflen) | |
2040 | { | |
2041 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
2042 | const struct in6_addr *addr = &sin6->sin6_addr; | |
2043 | ||
2044 | /* | |
2045 | * RFC 4291, Section 2.2.2 | |
2046 | * | |
2047 | * Shorthanded ANY address | |
2048 | */ | |
2049 | if (ipv6_addr_any(addr)) | |
2050 | return snprintf(buf, buflen, "::"); | |
2051 | ||
2052 | /* | |
2053 | * RFC 4291, Section 2.2.2 | |
2054 | * | |
2055 | * Shorthanded loopback address | |
2056 | */ | |
2057 | if (ipv6_addr_loopback(addr)) | |
2058 | return snprintf(buf, buflen, "::1"); | |
2059 | ||
2060 | /* | |
2061 | * RFC 4291, Section 2.2.3 | |
2062 | * | |
2063 | * Special presentation address format for mapped v4 | |
2064 | * addresses. | |
2065 | */ | |
2066 | if (ipv6_addr_v4mapped(addr)) | |
2067 | return snprintf(buf, buflen, "::ffff:%pI4", | |
2068 | &addr->s6_addr32[3]); | |
2069 | ||
2070 | /* | |
2071 | * RFC 4291, Section 2.2.1 | |
2072 | */ | |
2073 | return snprintf(buf, buflen, "%pI6c", addr); | |
2074 | } | |
2075 | ||
2076 | /* Derived from rpc_sockaddr2uaddr */ | |
2077 | static void | |
2078 | ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) | |
2079 | { | |
2080 | struct sockaddr *sap = (struct sockaddr *)&da->da_addr; | |
2081 | char portbuf[RPCBIND_MAXUADDRPLEN]; | |
2082 | char addrbuf[RPCBIND_MAXUADDRLEN]; | |
2083 | char *netid; | |
2084 | unsigned short port; | |
2085 | int len, netid_len; | |
2086 | __be32 *p; | |
2087 | ||
2088 | switch (sap->sa_family) { | |
2089 | case AF_INET: | |
2090 | if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) | |
2091 | return; | |
2092 | port = ntohs(((struct sockaddr_in *)sap)->sin_port); | |
2093 | netid = "tcp"; | |
2094 | netid_len = 3; | |
2095 | break; | |
2096 | case AF_INET6: | |
2097 | if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) | |
2098 | return; | |
2099 | port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); | |
2100 | netid = "tcp6"; | |
2101 | netid_len = 4; | |
2102 | break; | |
2103 | default: | |
2104 | /* we only support tcp and tcp6 */ | |
2105 | WARN_ON_ONCE(1); | |
2106 | return; | |
2107 | } | |
2108 | ||
2109 | snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); | |
2110 | len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); | |
2111 | ||
2112 | p = xdr_reserve_space(xdr, 4 + netid_len); | |
2113 | xdr_encode_opaque(p, netid, netid_len); | |
2114 | ||
2115 | p = xdr_reserve_space(xdr, 4 + len); | |
2116 | xdr_encode_opaque(p, addrbuf, len); | |
2117 | } | |
2118 | ||
2119 | static void | |
2120 | ff_layout_encode_nfstime(struct xdr_stream *xdr, | |
2121 | ktime_t t) | |
2122 | { | |
2123 | struct timespec64 ts; | |
2124 | __be32 *p; | |
2125 | ||
2126 | p = xdr_reserve_space(xdr, 12); | |
2127 | ts = ktime_to_timespec64(t); | |
2128 | p = xdr_encode_hyper(p, ts.tv_sec); | |
2129 | *p++ = cpu_to_be32(ts.tv_nsec); | |
2130 | } | |
2131 | ||
2132 | static void | |
2133 | ff_layout_encode_io_latency(struct xdr_stream *xdr, | |
2134 | struct nfs4_ff_io_stat *stat) | |
2135 | { | |
2136 | __be32 *p; | |
2137 | ||
2138 | p = xdr_reserve_space(xdr, 5 * 8); | |
2139 | p = xdr_encode_hyper(p, stat->ops_requested); | |
2140 | p = xdr_encode_hyper(p, stat->bytes_requested); | |
2141 | p = xdr_encode_hyper(p, stat->ops_completed); | |
2142 | p = xdr_encode_hyper(p, stat->bytes_completed); | |
2143 | p = xdr_encode_hyper(p, stat->bytes_not_delivered); | |
2144 | ff_layout_encode_nfstime(xdr, stat->total_busy_time); | |
2145 | ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); | |
2146 | } | |
2147 | ||
2148 | static void | |
2149 | ff_layout_encode_layoutstats(struct xdr_stream *xdr, | |
2150 | struct nfs42_layoutstat_args *args, | |
2151 | struct nfs42_layoutstat_devinfo *devinfo) | |
2152 | { | |
2153 | struct nfs4_ff_layout_mirror *mirror = devinfo->layout_private; | |
2154 | struct nfs4_pnfs_ds_addr *da; | |
2155 | struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; | |
2156 | struct nfs_fh *fh = &mirror->fh_versions[0]; | |
2157 | __be32 *p, *start; | |
2158 | ||
2159 | da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); | |
2160 | dprintk("%s: DS %s: encoding address %s\n", | |
2161 | __func__, ds->ds_remotestr, da->da_remotestr); | |
2162 | /* layoutupdate length */ | |
2163 | start = xdr_reserve_space(xdr, 4); | |
2164 | /* netaddr4 */ | |
2165 | ff_layout_encode_netaddr(xdr, da); | |
2166 | /* nfs_fh4 */ | |
2167 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
2168 | xdr_encode_opaque(p, fh->data, fh->size); | |
2169 | /* ff_io_latency4 read */ | |
2170 | spin_lock(&mirror->lock); | |
2171 | ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); | |
2172 | /* ff_io_latency4 write */ | |
2173 | ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); | |
2174 | spin_unlock(&mirror->lock); | |
2175 | /* nfstime4 */ | |
2176 | ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); | |
2177 | /* bool */ | |
2178 | p = xdr_reserve_space(xdr, 4); | |
2179 | *p = cpu_to_be32(false); | |
2180 | ||
2181 | *start = cpu_to_be32((xdr->p - start - 1) * 4); | |
2182 | } | |
2183 | ||
266d12d4 | 2184 | static int |
ad4dc53e | 2185 | ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, |
266d12d4 TM |
2186 | struct pnfs_layout_hdr *lo, |
2187 | int dev_limit) | |
ad4dc53e | 2188 | { |
266d12d4 | 2189 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); |
ad4dc53e PT |
2190 | struct nfs4_ff_layout_mirror *mirror; |
2191 | struct nfs4_deviceid_node *dev; | |
2192 | struct nfs42_layoutstat_devinfo *devinfo; | |
266d12d4 | 2193 | int i = 0; |
ad4dc53e | 2194 | |
266d12d4 TM |
2195 | list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { |
2196 | if (i >= dev_limit) | |
ad4dc53e | 2197 | break; |
266d12d4 | 2198 | if (!mirror->mirror_ds) |
27c43064 | 2199 | continue; |
266d12d4 TM |
2200 | /* mirror refcount put in cleanup_layoutstats */ |
2201 | if (!atomic_inc_not_zero(&mirror->ref)) | |
2202 | continue; | |
2203 | dev = &mirror->mirror_ds->id_node; | |
2204 | devinfo = &args->devinfo[i]; | |
ad4dc53e | 2205 | memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); |
266d12d4 TM |
2206 | devinfo->offset = 0; |
2207 | devinfo->length = NFS4_MAX_UINT64; | |
d099d7b8 | 2208 | devinfo->read_count = mirror->read_stat.io_stat.ops_completed; |
ad4dc53e | 2209 | devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; |
d099d7b8 | 2210 | devinfo->write_count = mirror->write_stat.io_stat.ops_completed; |
ad4dc53e PT |
2211 | devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; |
2212 | devinfo->layout_type = LAYOUT_FLEX_FILES; | |
27c43064 PT |
2213 | devinfo->layoutstats_encode = ff_layout_encode_layoutstats; |
2214 | devinfo->layout_private = mirror; | |
ad4dc53e | 2215 | |
266d12d4 | 2216 | i++; |
ad4dc53e | 2217 | } |
266d12d4 | 2218 | return i; |
ad4dc53e PT |
2219 | } |
2220 | ||
2221 | static int | |
2222 | ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) | |
2223 | { | |
266d12d4 TM |
2224 | struct nfs4_flexfile_layout *ff_layout; |
2225 | struct nfs4_ff_layout_mirror *mirror; | |
ad4dc53e PT |
2226 | int dev_count = 0; |
2227 | ||
2228 | spin_lock(&args->inode->i_lock); | |
266d12d4 TM |
2229 | ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout); |
2230 | list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { | |
2231 | if (atomic_read(&mirror->ref) != 0) | |
2232 | dev_count ++; | |
ad4dc53e PT |
2233 | } |
2234 | spin_unlock(&args->inode->i_lock); | |
2235 | /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ | |
2236 | if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) { | |
2237 | dprintk("%s: truncating devinfo to limit (%d:%d)\n", | |
2238 | __func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV); | |
2239 | dev_count = PNFS_LAYOUTSTATS_MAXDEV; | |
2240 | } | |
266d12d4 | 2241 | args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO); |
ad4dc53e PT |
2242 | if (!args->devinfo) |
2243 | return -ENOMEM; | |
2244 | ||
ad4dc53e | 2245 | spin_lock(&args->inode->i_lock); |
266d12d4 TM |
2246 | args->num_dev = ff_layout_mirror_prepare_stats(args, |
2247 | &ff_layout->generic_hdr, dev_count); | |
ad4dc53e | 2248 | spin_unlock(&args->inode->i_lock); |
ad4dc53e PT |
2249 | |
2250 | return 0; | |
2251 | } | |
2252 | ||
27c43064 PT |
2253 | static void |
2254 | ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data) | |
2255 | { | |
2256 | struct nfs4_ff_layout_mirror *mirror; | |
2257 | int i; | |
2258 | ||
2259 | for (i = 0; i < data->args.num_dev; i++) { | |
2260 | mirror = data->args.devinfo[i].layout_private; | |
2261 | data->args.devinfo[i].layout_private = NULL; | |
0b7baf94 | 2262 | ff_layout_put_mirror(mirror); |
27c43064 PT |
2263 | } |
2264 | } | |
2265 | ||
d67ae825 TH |
2266 | static struct pnfs_layoutdriver_type flexfilelayout_type = { |
2267 | .id = LAYOUT_FLEX_FILES, | |
2268 | .name = "LAYOUT_FLEX_FILES", | |
2269 | .owner = THIS_MODULE, | |
2270 | .alloc_layout_hdr = ff_layout_alloc_layout_hdr, | |
2271 | .free_layout_hdr = ff_layout_free_layout_hdr, | |
2272 | .alloc_lseg = ff_layout_alloc_lseg, | |
2273 | .free_lseg = ff_layout_free_lseg, | |
0762ed2c | 2274 | .add_lseg = ff_layout_add_lseg, |
d67ae825 TH |
2275 | .pg_read_ops = &ff_layout_pg_read_ops, |
2276 | .pg_write_ops = &ff_layout_pg_write_ops, | |
2277 | .get_ds_info = ff_layout_get_ds_info, | |
fc87701b | 2278 | .free_deviceid_node = ff_layout_free_deviceid_node, |
338d00cf | 2279 | .mark_request_commit = pnfs_layout_mark_request_commit, |
d67ae825 TH |
2280 | .clear_request_commit = pnfs_generic_clear_request_commit, |
2281 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
2282 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
2283 | .commit_pagelist = ff_layout_commit_pagelist, | |
2284 | .read_pagelist = ff_layout_read_pagelist, | |
2285 | .write_pagelist = ff_layout_write_pagelist, | |
2286 | .alloc_deviceid_node = ff_layout_alloc_deviceid_node, | |
2287 | .encode_layoutreturn = ff_layout_encode_layoutreturn, | |
5bb89b47 | 2288 | .sync = pnfs_nfs_generic_sync, |
ad4dc53e | 2289 | .prepare_layoutstats = ff_layout_prepare_layoutstats, |
27c43064 | 2290 | .cleanup_layoutstats = ff_layout_cleanup_layoutstats, |
d67ae825 TH |
2291 | }; |
2292 | ||
2293 | static int __init nfs4flexfilelayout_init(void) | |
2294 | { | |
2295 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", | |
2296 | __func__); | |
90a0be00 JL |
2297 | if (!ff_zero_group) { |
2298 | ff_zero_group = groups_alloc(0); | |
2299 | if (!ff_zero_group) | |
2300 | return -ENOMEM; | |
2301 | } | |
d67ae825 TH |
2302 | return pnfs_register_layoutdriver(&flexfilelayout_type); |
2303 | } | |
2304 | ||
2305 | static void __exit nfs4flexfilelayout_exit(void) | |
2306 | { | |
2307 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", | |
2308 | __func__); | |
2309 | pnfs_unregister_layoutdriver(&flexfilelayout_type); | |
90a0be00 JL |
2310 | if (ff_zero_group) { |
2311 | put_group_info(ff_zero_group); | |
2312 | ff_zero_group = NULL; | |
2313 | } | |
d67ae825 TH |
2314 | } |
2315 | ||
2316 | MODULE_ALIAS("nfs-layouttype4-4"); | |
2317 | ||
2318 | MODULE_LICENSE("GPL"); | |
2319 | MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); | |
2320 | ||
2321 | module_init(nfs4flexfilelayout_init); | |
2322 | module_exit(nfs4flexfilelayout_exit); |